Sound record reproducing device



Patented May i2, W3@

PATENT OFFICE l Ziifiit SOUND itECGRli REPRODUGING DEVICE Jose! llrioly,V Vienna, Austria l Applicaties. .time 1e, 193e, serial No. V 673,014

- In Austria. my s, 1933 i claim. (ci. 27d- 16) 5 sound boxes, so that the purity of the reproducedV sound is considerably impaired.

'I'his invention has for its object to replace the sound box by a simple and much cheaper arrangement which renders possible a. direct reprol duction of the sound record with purity oi' sound.

'I'he novelty consists chieiiy in the fact that a metal tongue carrying a gramophone needle is connected to a carrier which does not transmit natural oscillations and which is adapted to be l fitted inA to the tone arm, a diaphragm being carried on thetongue by means of a rod projecting therefrom at an angle. Y

An embodiment of the invention is illustrated by way of example in the accompanying drawing Fig. 1 shows the device in side elevation partly in section mounted on the tone arm of a gramophone.

n Fig. 2 is an end view oi' Fig. 1, e diaphragm 2b being removed;

An arm shaped carrier I has a lateral project-v ing pin 2 adapted to be inserted in the sleeve shaped end of the tone arm II of a gramophone.- The carrier I togetherwith the pin "2 is relatively heavy or so constructed that it does not transmitvoscillations during the sound reproduction. The carrier I carries on the side remote( from the pin 2 a flat metal tongue 3 which is iixed only at its upper end to the carrier I by a screw 4. 35 The metal tongue 3, which need not rest along its entire length on the carrier I, carries on its other end a holder 5 of known type for fixing a gramophone needle 8. The tongue 3 carries behind the holder 5 a metal rod 'l projecting at rightangles or at some other suitable angle on the :tree end of which a diaphragm 8 is detachably secured. The diaphragm 8 in the example illus- 5 trated forms a fiat tunnel which is mounted on the free end of the rod 1 by means of a sleeve 9 extending from the apex of the funnel and xed by a clamping screw III. `In this way the tongue 3 is separated from the carrier I through- 10 out its length except where the parts are iixed together by the screw 4. p

When reproducing sound, the rod 1 and the diaphragm 8 are oscillated by the needle 6 running in the groove of they record in the usual manner, an extremely pure sound reproduction free from secondary noises being obtained; By suitably selecting the length of the rod l and the size or conical shape of the diaphragm 8 the n timbre of the sound reproduction can be' deter- 20 mined as desired. f

Sound`record reproducing device for gramophones, comprising in combination with the tone arm yhaving a sleeve shaped end, a carrier insensitiv'e for the taking up of oscillations inserted in the sleeve-shaped end of said tone arm, a

4metal tongue bearing against and xed only at its upper end to said carrier, a needle mounted at the lower end of said tongue and adapted to transmit oscillations to said tongue, a metal rod vfixed at one end to said tongue neark the lower end thereof and adapted to transmit ythe movements of said tongue, and a diaphragm mounted on the other end of said rod adapted to be 3o actuated by said rod.

JOSEF HOLY. 

